# US 12,763,013 B2 · Display device, electronic device, and method of driving display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,763,013 B2 - Document ID: US12763013B2 - Status: Granted - Kind: B2 - Application number: 19/198,392 - Filed: 2025-05-05 - Published: 2025-12-25 - Granted: 2026-10-13 - Earliest claimed: 2024-06-20 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Gyeong Ub Moon; Yu Na Kim; Jong Yeop An; Dong Wook Yang; Hyeon Jun Lee - Web page: https://patentgrep.com/patent/US12763013B2 ## CPC - G09G 3/3225: using an active matrix - G09G 2320/0233: Improving the luminance or brightness uniformity across the screen - G09G 2360/142: the light being detected by light detection means within each pixel - G09G 2360/16: Calculation or use of calculated indices related to luminance levels in display data - G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00) ## Abstract A method of driving a display device is disclosed in which the display device includes a pixel and a photo sensing pixel. The method includes: performing a first sensing operation of emitting light by the pixel and operating the photo sensing pixel; performing a second sensing operation of not emitting light by the pixel and operating the photo sensing pixel; and calculating a compensation value for compensating degradation of the pixel based on first sensing data according to the first sensing operation and second sensing data according to the second sensing operation. ## Claims ### Claim 1 A method of driving a display device including a pixel and a photo sensing pixel, the method comprising: performing a first sensing operation of emitting light by the pixel and operating the photo sensing pixel; performing a second sensing operation of not emitting light by the pixel and operating the photo sensing pixel; and calculating a compensation value for compensating degradation of the pixel based on first sensing data according to the first sensing operation and second sensing data according to the second sensing operation. ### Claim 2 (depends on 1) The method of claim 1, wherein the pixel includes a light emitting element, the photo sensing pixel includes a light receiving element, and the light emitting element and the light receiving element are disposed in a same layer. ### Claim 3 (depends on 1) The method of claim 1, wherein some of the light emitted from the pixel is reflected inside the display device to reach the photo sensing pixel located adjacent to the pixel. ### Claim 4 (depends on 1) The method of claim 1, wherein the calculating the compensation value includes: acquiring differential data by performing a subtraction operation on the first sensing data and the second sensing data; calculating a degradation degree of the pixel based on comparing the differential data and baseline data; and calculating the compensation value, based on the degradation degree, and wherein the baseline data includes an average value of the first sensing data or the differential data, or the baseline data is differential data generated before the pixel is degraded. ### Claim 5 (depends on 1) The method of claim 1, wherein the performing the first sensing operation includes driving the pixel to emit light with a maximum brightness. ### Claim 6 (depends on 1) The method of claim 1, wherein the performing the first sensing operation includes driving pixels of the display device to emit light in a whole of a display surface of the display device. ### Claim 7 (depends on 1) The method of claim 1, further comprising: performing a third sensing operation of allowing the pixel to emit light and allowing the photo sensing pixel to operate by reflecting the compensation value; determining whether values of third sensing data according to the third sensing operation are uniform; and repeating the performing of the first sensing operation, the performing of the second sensing operation, and the calculating of the compensation value when the values of the third sensing data are not uniform. ### Claim 8 (depends on 1) The method of claim 1, wherein the pixel includes sub-pixels each of which is configured to emits light of a different color, wherein the performing the first sensing operation drives only one sub-pixel of the sub-pixels to emit light, and wherein the calculating the compensation value calculates the compensation value for the one sub-pixel of the sub-pixels. ### Claim 9 (depends on 1) The method of claim 1, further comprising determining whether an object exists on a display surface of the display device through a touch sensor, wherein the first sensing operation is performed when the object does not exist on the display surface, and wherein the first sensing operation is not performed when the object exists on the display surface. ### Claim 10 (depends on 1) The method of claim 1, further comprising determining whether an illuminance calculated based on the second sensing data is smaller than a reference value, wherein the first sensing operation is performed when the illuminance is smaller than the reference value, and wherein the first sensing operation is not performed when the illuminance is greater than or equal to the reference value. ### Claim 11 A display device comprising: a display panel including a pixel and a photo sensing pixel; a panel driver configured to drive the pixel to emit light; and a sensor driver configured to operate the photo sensing pixel, wherein the sensor driver acquires first sensing data by operating the photo sensing pixel while the pixel emits light, and acquires second sensing data by operating the photo sensing pixel while the pixel does not emit light, and wherein the panel driver calculates a compensation value for compensating degradation of the pixel based on the first sensing data and the second sensing data. ### Claim 12 (depends on 11) The display device of claim 11, wherein the pixel includes a light emitting element, the photo sensing pixel includes a light receiving element, and the light emitting element and the light receiving element are disposed in a same layer. ### Claim 13 (depends on 11) The display device of claim 11, wherein some of the light emitted from the pixel is reflected inside the display device to reach the photo sensing pixel located adjacent to the pixel. ### Claim 14 (depends on 11) The display device of claim 11, wherein the panel driver acquires differential data by performing a subtraction operation on the first sensing data and the second sensing data, calculates a degradation degree of the pixel based on comparing the differential data and baseline data, and calculates the compensation value, based on the degradation degree, and wherein the baseline data includes an average value of the first sensing data or the differential data, or the baseline data is differential data generated before the pixel is degraded. ### Claim 15 (depends on 11) The display device of claim 11, wherein, when the sensor driver acquires the first sensing data, the panel driver drives pixels of the display device to emit light with a maximum brightness in a whole of a display surface of the display panel. ### Claim 16 (depends on 11) The display device of claim 11, wherein the panel driver allows the pixel to re-emit light by reflecting the compensation value, and the sensor driver acquires third sensing data by allowing the photo sensing pixel to operate while the pixel re-emits light, and determines whether values in the third sensing data are uniform. ### Claim 17 (depends on 11) The display device of claim 11, wherein the pixel includes sub-pixels each of which emits light of a different color, and wherein the sensor driver acquires the first sensing data by operating the photo sensing pixel while only one sub-pixel of the sub-pixels emits light, and calculates a compensation value for the one sub-pixel of the sub-pixels. ### Claim 18 (depends on 11) The display device of claim 11, further comprising a touch sensor configured to sense an object on a display surface of the display device, wherein the sensor driver acquires the first sensing data when the object does not exist on the display surface, and does not acquire the first sensing data when the object exists on the display surface. ### Claim 19 (depends on 11) The display device of claim 11, wherein the sensor driver determines whether an illuminance calculated based on the second sensing data is smaller than a reference value, acquires the first sensing data when the illuminance is smaller than the reference value, and does not acquire the first sensing data when the illuminance is greater than or equal to the reference value. ### Claim 20 An electronic device comprising: a processor configured to provide an input image data; a display device configured to display an image, based on the input image data; and a power supply configured to supply power to the display device, wherein the display device includes: a display panel including a pixel and a photo sensing pixel; a panel driver configured to drive the pixel to emit light; and a sensor driver configured to operate the photo sensing pixel, wherein the sensor driver acquires first sensing data by operating the photo sensing pixel while the pixel emits light, and acquires second sensing data by operating the photo sensing pixel while the pixel does not emit light, and wherein the panel driver calculates a compensation value for compensating degradation of the pixel based on the first sensing data and the second sensing data.